/**
 * ***************************************************************************** Copyright (c) 2011,
 * 2012 IBM Corporation and others. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * <p>Contributors: IBM Corporation - initial API and implementation
 * *****************************************************************************
 */
package org.eclipse.che.plugin.java.server.jdt.quickfix;

import java.util.Hashtable;
import java.util.List;
import org.eclipse.che.plugin.java.server.jdt.testplugin.Java17ProjectTestSetup;
import org.eclipse.che.plugin.java.server.jdt.testplugin.JavaProjectHelper;
import org.eclipse.che.plugin.java.server.jdt.testplugin.TestOptions;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.formatter.DefaultCodeFormatterConstants;
import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility;
import org.eclipse.jdt.internal.corext.template.java.CodeTemplateContextType;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.text.correction.AssistContext;
import org.eclipse.jdt.internal.ui.text.correction.CorrectionMessages;
import org.eclipse.jdt.ui.PreferenceConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class AdvancedQuickAssistTest17 extends QuickFixTest {

  private IJavaProject fJProject1;

  private IPackageFragmentRoot fSourceFolder;

  public AdvancedQuickAssistTest17() {
    super(new Java17ProjectTestSetup());
  }

  @Before
  public void setUp() throws Exception {
    super.setUp();
    Hashtable options = TestOptions.getDefaultOptions();
    options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_CHAR, JavaCore.SPACE);
    options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_SIZE, "4");

    JavaCore.setOptions(options);

    IPreferenceStore store = JavaPlugin.getDefault().getPreferenceStore();
    store.setValue(PreferenceConstants.CODEGEN_ADD_COMMENTS, false);
    store.setValue(PreferenceConstants.CODEGEN_KEYWORD_THIS, false);

    StubUtility.setCodeTemplate(
        CodeTemplateContextType.METHODSTUB_ID, "//TODO\n${body_statement}", null);

    //		Preferences corePrefs = JavaPlugin.getJavaCorePluginPreferences();
    //		corePrefs.setValue(JavaCore.CODEASSIST_FIELD_PREFIXES, "");
    //		corePrefs.setValue(JavaCore.CODEASSIST_STATIC_FIELD_PREFIXES, "");
    //		corePrefs.setValue(JavaCore.CODEASSIST_FIELD_SUFFIXES, "");
    //		corePrefs.setValue(JavaCore.CODEASSIST_STATIC_FIELD_SUFFIXES, "");

    fJProject1 = Java17ProjectTestSetup.getProject();

    fSourceFolder = JavaProjectHelper.addSourceContainer(fJProject1, "src");
  }

  @After
  public void tearDown() throws Exception {
    super.tearDown();
    JavaProjectHelper.clear(fJProject1, Java17ProjectTestSetup.getDefaultClasspath());
  }

  @Test
  public void testConvertSwitchToIf() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        switch (s) {\n");
    buf.append("        case \"abc\":\n");
    buf.append("            System.out.println();\n");
    buf.append("            break;\n");
    buf.append("        case \"xyz\":\n");
    buf.append("            System.out.println();\n");
    buf.append("            break;\n");
    buf.append("        default:\n");
    buf.append("            System.out.println();\n");
    buf.append("            break;\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("switch");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (\"abc\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (\"xyz\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s.equals(\"abc\")) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (s.equals(\"xyz\")) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected2 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1, expected2});
  }

  @Test
  public void testConvertIfToSwitch1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s.equals(\"abc\")) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (s.equals(\"xyz\")) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 4);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        switch (s) {\n");
    buf.append("            case \"abc\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            case \"xyz\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            default :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertIfToSwitch2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (\"abc\" == s) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (\"xyz\" == s) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 3);
    assertCorrectLabels(proposals);

    assertProposalDoesNotExist(
        proposals, CorrectionMessages.AdvancedQuickAssistProcessor_convertIfElseToSwitch);
  }

  @Test
  public void testConvertIfToSwitch3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (\"abc\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (\"xyz\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 5);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        switch (s) {\n");
    buf.append("            case \"abc\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            case \"xyz\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            default :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s == null) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            switch (s) {\n");
    buf.append("                case \"abc\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("                case \"xyz\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("                default :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("            }\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected2 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1, expected2});
  }

  @Test
  public void testConvertIfToSwitch4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s.equals(\"abc\")) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (\"xyz\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 5);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        switch (s) {\n");
    buf.append("            case \"abc\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            case \"xyz\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            default :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s == null) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else {\n");
    buf.append("            switch (s) {\n");
    buf.append("                case \"abc\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("                case \"xyz\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("                default :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("            }\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected2 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1, expected2});
  }

  @Test
  public void testConvertIfToSwitch5() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (\"abc\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        } else if (\"xyz\".equals(s)) {\n");
    buf.append("            System.out.println();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 5);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        switch (s) {\n");
    buf.append("            case \"abc\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("            case \"xyz\" :\n");
    buf.append("                System.out.println();\n");
    buf.append("                break;\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public class E {\n");
    buf.append("    public void foo(String s) {\n");
    buf.append("        if (s == null) {\n");
    buf.append("        } else {\n");
    buf.append("            switch (s) {\n");
    buf.append("                case \"abc\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("                case \"xyz\" :\n");
    buf.append("                    System.out.println();\n");
    buf.append("                    break;\n");
    buf.append("            }\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected2 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1, expected2});
  }

  @Test
  public void testReplaceReturnConditionWithIf4() throws Exception {
    // https://bugs.eclipse.org/bugs/show_bug.cgi?id=112443
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.Collections;\n");
    buf.append("import java.util.List;\n");
    buf.append("public class E {\n");
    buf.append("    List<String> foo(int a) {\n");
    buf.append("        return a > 0 ? new ArrayList<>() : new ArrayList<>();\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("?");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    List proposals = collectAssists(context, false);

    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.Collections;\n");
    buf.append("import java.util.List;\n");
    buf.append("public class E {\n");
    buf.append("    List<String> foo(int a) {\n");
    buf.append("        if (a > 0)\n");
    buf.append("            return new ArrayList<>();\n");
    buf.append("        else\n");
    buf.append("            return new ArrayList<>();\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testReplaceReturnIfWithCondition3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.ArrayList;\n");
    buf.append("import java.util.List;\n");
    buf.append("public class E {\n");
    buf.append("    public List<String> foo(int a) {\n");
    buf.append("        if (a > 0) {\n");
    buf.append("            return new ArrayList<>();\n");
    buf.append("        } else {\n");
    buf.append("            return new ArrayList<>();\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.ArrayList;\n");
    buf.append("import java.util.List;\n");
    buf.append("public class E {\n");
    buf.append("    public List<String> foo(int a) {\n");
    buf.append("        return a > 0 ? new ArrayList<String>() : new ArrayList<String>();\n");
    buf.append("    }\n");
    buf.append("}\n");

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testReplaceReturnIfWithCondition4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.Collections;\n");
    buf.append("import java.util.Map;\n");
    buf.append("public class E {\n");
    buf.append("    public Map<String, java.io.IOException> foo(int a) {\n");
    buf.append("        if (a > 0) {\n");
    buf.append("            return Collections.emptyMap();\n");
    buf.append("        } else {\n");
    buf.append("            return Collections.singletonMap(\"none\", null);\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("if");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.io.IOException;\n");
    buf.append("import java.util.Collections;\n");
    buf.append("import java.util.Map;\n");
    buf.append("public class E {\n");
    buf.append("    public Map<String, java.io.IOException> foo(int a) {\n");
    buf.append(
        "        return a > 0 ? Collections.<String, IOException>emptyMap() : Collections.<String, IOException>singletonMap(\"none\", null);\n");
    buf.append("    }\n");
    buf.append("}\n");

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }
}
